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decarrion

nijkerk, NL
79 posts

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decarrion Silver Member Nikonian since 12th Feb 2009
Mon 01-Jul-13 09:42 AM

dear all
yesterday i used my D700 with my 28-300 and a B&W filter to record this scene. I used Topaz plugin detail 3.0 for Photoshop to enhance the features. I noticed in the skies several rings. Can anyone explain this.
i darkened it a bit to get it more prominent

Click on image to view larger version


Attachment#1 (jpg file)

“There is only you and your camera. The limitations in your photography are in yourself, for what we see is what we are.”

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cpopescu

BUcharest, RO
120 posts

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#1. "RE: rings in photo" | In response to Reply # 0

cpopescu Gold Member Nikonian since 14th Apr 2011
Mon 01-Jul-13 08:38 AM

What kind of filter did you use? Polarizing?

Catalin

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decarrion

nijkerk, NL
79 posts

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#2. "RE: rings in photo" | In response to Reply # 1

decarrion Silver Member Nikonian since 12th Feb 2009
Mon 01-Jul-13 09:04 AM

just an UV

“There is only you and your camera. The limitations in your photography are in yourself, for what we see is what we are.”

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Leonard62

Pa, US
4419 posts

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#3. "RE: rings in photo" | In response to Reply # 0

Leonard62 Gold Member Awarded for excellent contributions and sharing his in-depth knowledge and experience with the community, especially of Nikkor Lenses Writer Ribbon awarded for his contributions to the Nikonians Resources articles library Nikonian since 15th Mar 2009
Mon 01-Jul-13 11:06 AM | edited Mon 01-Jul-13 11:07 AM by Leonard62

We have seen this before. It appears to always be the result of non-standard post processing. How does the photo look without the Topaz processing?

Len

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ajdooley

Waterloo, US
3330 posts

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#4. "RE: rings in photo" | In response to Reply # 0

ajdooley Gold Member Nikonian since 25th May 2006
Tue 02-Jul-13 01:06 PM

I agree with Len. I used to use ACDsee Pro and encountered this a few times as well -- but I don't remember exactly how, as I have shifted almost exclusively to RAW files editing with CS6. I'd start with the original file and observe carefully as you edit. I think it is safe to say, this is NOT your camera.

Alan
Waterloo, IL, USA
www.proimagingmidamerica.com

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decarrion

nijkerk, NL
79 posts

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#5. "RE: rings in photo" | In response to Reply # 4

decarrion Silver Member Nikonian since 12th Feb 2009
Tue 02-Jul-13 01:18 PM

Len en Alan, thank you
the file looks oke in Cs3
just like topaz detail
now i know
thought it was the filter

thank you and happy photo times
from overcast Holland

Pieter

“There is only you and your camera. The limitations in your photography are in yourself, for what we see is what we are.”

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niksi

Kranj, SI
219 posts

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#6. "RE: rings in photo" | In response to Reply # 5

niksi Silver Member Nikonian since 20th Jul 2006
Wed 03-Jul-13 02:41 PM

Hi Pieter,

I assume that you took original picture in JPG.
Since JPG coding handles only 8 bits per colour, you have only 256 levels of each colour.
It is quite common that you get pretty distinct bands of a colour in the areas of very subtle tonal changes. This effect is particulary visible when shooting blue sky. When shooting RAW you get more levels of colours and this effect is not so obvious but can still be detected.

When you apply some kind of an edge detection filter to the picture these changes become even more exagerated. You applied Topaz detail filter which detected these subtle tonal changes and produced unpleasant effects along the tonal "isohipses" of the blue sky. Topaz filters are extremely agressive and you have to be very carefull when apllying them since they often produce unwanted and/or unpleasant results.

Try to observe the original picture without any filters applied. Hoover the mouse pointer acros the blue sky and observe the numerical levels of colours (particulary blue) in Photoshop or any other picture editing/viewing programme. You will notice these subtle tonal changes and they will very probably coincide with the "ridges" in your final pictures.

Please let us know whether my theory is correct. If yes, your return info can help many other Nikonians to avoid similar unpleasant effects.

Kind regards,
Niko
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